<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>主页面</title>
</head>
<body>
    
    <div>主页面</div>
    <iframe src="./ifr.html"></iframe>
    <script>
        window.addEventListener("message", function(ev){
            console.log("message:", ev.data)
        })
    </script>
</body>
</html>